<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var num=1;
        
     
        for (var x in  window) {
            document.write(num+++" "+x+"</br>");
          
        }


        </script>
    
</body>
</html>